Discuss 1966 3 speed rattle on AllFordMustangs.com, the place for Mustang enthusiasts.
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My 3 speed transmission has been rebuilt (shifter and all), and still has an annoying rattle while driving. Crawling underneath, it looks like the shifter rods (think that's the right term) are hitting each other right underneath the shifter, metal on metal, which is causing the rattle.
Supposedly I'm missing some 'wavy washers' from what I gather from other posts, but I'm looking for a picture of said washers and what the transmission is supposed to look like with them in place? I checked out an expanded view and didn't see the washers.
Refer to the two attached photos of the exploded view of the 3-speed and 4-speed shifter. I included the 4-speed assembly view becuase its a little easier to see the wave washer.
The "wave washer" (sometimes referred to as a bellville washer) is placed on the linkage stud end just before the flat washer. It is the # 351467-S in the attached diagrams.
Call mark Hammons at Toploader Heaven. He sells the trunions with the wave washer and he might be able to sell you just the washer itself
Sorry, but I forgot to mention that yes, the wave washer puts a spring like tension on the shifting linkage when attached to the shift levers (at both the transmission and shifter) to prevent the linkage from "rattling" around.
Install all 6 wave washers and the rattling noise you hear should disappear.
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'66 Ragtop, vibrant red, 289-4V, 4-speed toploader
'68 Fastback, space blue metalic, 351C-4-V, 4-speed toploader